Coordinates may be referenced to mean dynamic equinox and ecliptic of date or to FK5. The inclusion of nutation and/or aberration is freely selectable.
Time data are displayed for ITRF Greenwich zero meridian. Solar and sidereal times are also displayed for any other freely user-selectable location anywhere on planet earth, e.g. for your home
observation site.

Other features:

The program uses the internal clock of the computer and an easy-to-edit configuration file only.

The screen display has manual and automatic mode, update interval in automatic mode may be selected
between one and 60 seconds.

Timely announcements are issued when Moon phases, solstices, or equinoxes are nearing.

Nutation and precession are modelled with conventional paradigm using IAU 1980 lunisolar
series. Various options for equation of equinoxes are available:
classical or IAU equation, with or without Herring's and Vondrak's corrections.

Two obliquity polynomials are selectable.

Enables computations for freely user-supplied date & time (typed through keyboard or read from file, with appropriate internal evaluation of ephemeris time). Julian and Gregorian calendar are implemented, covering a total timespan from 9999 BC to AD 9999. Thus, compilation of time-lapse-sequences is possible.

The internal ephemeris time model uses latest results from F.R. Stephenson,L.V. Morrison,J. Chapront,M. Chapront-Touz&eacute, and G. Francou. It is adjusted for most actual tidal acceleration
and incorporates high-precision Delta-T values (derived from IERS C04 data) up to date of issue.
The model may be modified by user-supplied Delta-T values.

DUT1 is freely selectable by user.

The output may also be directed to a protocol file.

Acoustic time signalling (time beeps) can be selected.

The package comes with detailed user instructions, as well as information about algorithms,
accuracy, and literature references.

MAXCLOCK will run on any PC / XT / AT (x86, x88, x286, x386, x486, Pentium, with or without math
coprocessor), under any DOS or WINDOWS operating system.
A textmode-only black & white screen and 390 kB RAM (800 kB RAM under WINDOWS VISTA / WINDOWS 7 / WINDOWS 8) will suffice.
(For automatic clock mode, a working system clock and a x286 processor, preferably
with coprocessor, is required at minimum.)

Distribution:

MAXCLOCK is distributed for free, either per e-mail directly by the author (including tailored configuration file) or per
download from the webpage.